Adding attachment for type-writers.



' J. 0. WOLFE & E. W. MORTON.

Patented May 2'7, 1913.

3 8 SHEETS-SHEET 1.

amass/u "4o 4919/84/99 01 0&0)

WITNESSES" W nus/7 5;

J. G. WOLFE & E W. MORTON. ADDING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED 00124, 1899.

1,0 2, 70, Patented May 2?, 1913.

a 8 SHEETS-SHEET 2.

' IN VE N 705.5

J. O. WOLFE & E. W. MORTON. ADDING ATTACHMENT FOR TYPE WRITERS. 7

APPLICATION FILED OCT. 24, 1899.

Patented May 27, 1913.

8 SEEETSSHEET 3.

lNVENT WITNESSES J. O. WOLFE & B. W. MORTON. ADDING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED OUT. 24, 1899.

Patented May 27, 1913.

8 SHEETS-SHEET 4.

J. G. WOLFE & E. W, MORTON. ADDING ATTACHMENT FOR TYPE WRITERS.

APPLIOATION FILED OUT. 24, 1899.

Patented May 27, 1913.

8 SHEETSSHEET G.

INVENTOH J, O. WOLFE & E. W. MORTON. ADDING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED OUT. 24, 1899.

Patented May 2'7, 1913.

8 SHEETS-SHEET 6.

QEHIMH HH H INF L WITNESSES J. O. WOLFE 81: E. W. MORTON.

ADDING ATTACHMENT FOR TYPE WRITERS. I

APPLiOATIONlILI-ID OUT. 24, 1899.

Patented May 27, 1913.

' 8 QHEBTS-SHBET 7.

Q/Vi/t neooco 6 47 J. G. WOLFE & E. W. MORTON. ADDING ATTACHMENT FOR TY PE WRITERS.

APPLICATION FILED OUT. 24, 1899.

Patented May 27, 1913.

B SHEETS-SEEET 8.

, mechanism, the carriage for nism and the carriage shaft and being in transverse section; Fig. elevation of the carriage shown in Fig. 10,

the city of New York,

JACOB C. WOLFE, OF NEW YORK, AND EDWIN AND MESNE YORK, ASSIGNORS, BY DIRECT W. MORTON, OF WHITE PLAINS, NEW

ASSIGNMENTS, T0 .AUTOMATA COM- PANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ADDING ATTACHMENT FOR TYPE-WRITERS.

To all whom it may concern:

Be it known that we, J ACOB C. IVOLFE, of

borough of Manhattan," in the county and State of New York, and EDWIN WV. MoR'roN, of White Plains, in the county of VVestchester and State of New York,'have invented a new and Improved Adding Attachment for Type-Writers, of which the following is a full, clear, and exact description.

The object of the invention is to provide an improved adding attachment for typewiting or similar machines, so constructed that as figures areprinted in columns by said machine the sum of figures in any number of columns may be read upon a group of index wheels constituting a portion of the attachment.

The invention consists in the novel construction and combination of the severalv parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings forming a partof this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of the attachment; Fig. 2 is a front elevation of the same; Fig. 3 is a longitudinal section taken substantially on the line 3-3 of Fig. 1; Fig. 4 is a transverse vertical section taken on the line 4- i of Fig. 1, the drive wheel, index or adding wheels, carrying wheels, alining bars and check mechanism being in their normal positions; Fig. 5 is a section-taken on the same line as in Fig. 4, showing the position occupied by the parts in said Fig. 4: just prior to the time the electrical contact is made that causes the drive wheel to be actuated; Fig. 6 is a section taken on the same line as in Figs. 4 and 5, illustrating the position occupied by the parts shownin the said figures, when the index or adding wheels are to be re-set; Fig. 7 is a view of the left-hand side of the machine; Fig. 8 is a section taken substantially on the line 8-8 of Fig. 1; Fig. 9 is asection taken substantially on the line 9-9 of Fig. 1; Fig. 10 is .a side elevation of the check -said mechadrive shaft 11 is a side Specification of Letters Patent.

drive wheel.

Patented May 2'7, 1913.

Application filed October 24, 1899. Serial No. 734,618.

and an edge view of the check mechanism; Fig. 12 is a plan view of a typewriting machine'of well-known form with our improvements' applied; Fig. 13 is a bottom plan view of a portion of the support for the key levers and the universal bar shaft, illustrating the position of the contact points carried thereby; Fig. 14 is a detail view of the Fig. 15 is a perspective view of the swinging frame G together with one of the index wheels and a carrying wheel which carries the tens therefrom, as will be hereinafter fully set forth. Fig. 16 is a vertical sectional view taken through two adjacent index wheels with which cooperate three tens carrying wheels one of which is shown as dropped out of engagement with the index wheel to which it carries the tens. Fig. 17 shows a vertical section of the typewriting machine shown in Fig. 12 on the line 17--17 of Fig. 12, and illustrates particularly the relation of the adding mechanism to the printing mechanism.

The typewriting machine to which our improvements may be applied may be ofany approved construction. We have shown it applied to a machine of the Remington tvpe and have indicated in the drawings ony so much of a machine of this class as is necessary to. show the manner of using our invention on such machines.

As indicated in Fig. 17 the typewriting machine is supported by standards, P, and held sufiiciently elevated to accommodate the adding mechanism. The carriage, Q, of the writing machine slides back and forth on suitable guides as usual and the are arranged in the usual way. The type bars, S, are connected with the keys, A, by rods, 8, and the universal bar, T, is connected with suitable spacing mechanism, U. The letters and figures are printed on the paper as usual by the manual operation of the keys, A, but the several figure keys are connected with the adding mechanism in the manner now to be described, the arrangement being such that whenever a figure is printed the adding mechanism is operated to record the value of the figure.

The frame of the adding or calculating machine consists usually-of two side bars 10, connected at or near their centers by a longitudinal bar 11, in the'top of which bar a longitudinal groove 12 is made, arranged keys, A, v

to receive a rod 13, held in position by set screws 14 or their equivalents, and the said rod 13 is utilized to pivot the key levers A, which are nine in number. The right-hand leveris adapted to be brought beneath the letter 1, which usually represents. the-numeral 1 on a typcwriting machine, and the other levers are brought respectively under the numeral keys, reading from 2 to 9 inclusive. Each key lever A is carried across a fixed bar 15 which is in front of the cross bar 11. This fixed bar 15, is shown in Figs.v 1 and 3, and between the fulcrum bar 11 for the key levers and the front bar '15, a support 16 is provided, usually in the nature ofa bar, and on this support springs 16 are located, which serve to assist the key levers in assuming a normal position after they have been depressed.

The front fixed bar 15 is provided with a "series of checks 17, adapted to prevent two key levers from being depressed at the same time. These checks 17 are in the nature of plates, and are best shown in Fig. 8. The said plates are substantially T-shaped in general contour,- the ends of their heads 19 being adapted for engagement with each other, but there is suflicient space between the various checks to admit of the passage of a single key lever when the checks have been properly adjusted, and such adjustment is accomplished through the medium of a screw 17 placed preferably at one end of the frame, as is also shown in Fig. 3. The key levers extend normally through the space etween the shanks of the checks, and when one key lever is depressed at its rear end it will find a passage upward between the checks near which it is located, but the remainder of the checks will be crowded together to such an extent that none of the other key levers can be raised. These checks are pivoted by means of pins 18 or their equivalents passed.

, through the lower end portions of their shanks and into the aforesaid fixed. bar 15. Each key lever at its rear end is provided with a friction roller 20, .and these friction rollers are adapted to be engaged by the keys of the type-writing machine with which they are to be associated. The levers A do not pass entirely beyond the space between the checks, and are therefore never entirely beyond the control of the checks.

A forward partition 21 extends from side to side of the frame, as is shown in Figs. 1, 2 and 3, and this partition 21 carries a series of bolts 22,.n1ounted to slide in suitable bearings 23. Some of these bolts are arranged at the front of the partition 21 and others at the rear, and each bolt is connected with a key lever with'the exception of the key lever adapted to be depressed by the numeral key 9 of the type writing machine. These bolts are so arranged that the bolt conneoted with thelnumeral key lever 1 is the uppermost bolt, and this bolt is Stationary and is distinguished from the others by the reference numeral 32- and is best shown in Fig. 3. Each key lever is connected with a lever 2st, and these levers are fulcrumed by means of suitable pins 25, some at the front side of the frontpartition 21 and others at the rear side of the said partition, as shown in Figs. 1 and 3. The levers 2% are in the form of angle orelbow levers, but each lever 24 is provided at its left-hand end with a spur 26, and a recess 27 next the said spur, the recesses 27 of the said levers being produced in their upper edges, and each lever 24 is further provided with a curved or segmental section 28, extending from the right-hand of a recess 27, which is lower than the left-hand wall, to' a point near the right-hand end of the lever, as is best shown in Fig. 3, and the lower or right-hand end of each lever 24 is connected by a link 29. or its equivalent. with the forward end of a keylever A. Each movable bolt 22 is provided at its right-hand or inner end preferably with a flattened surface and with a pin 30, which projects from the said flattened surface and is adapted to enter and normally remain in a recess 27 of one of thebolt actuating levers 245 controlled by the key levers. Each time a key lever is depressed, the bolt actuating lever 24: connected therewith is operated in a manner to throw the bolt in communication therewith toward the left-handside of the frame, and through an opening provided for the outer end of the bolt in a short transverse partition 31 adjacent to the right-hand side of the frame, as is indicated in, Fig. 3; but the uppermost or stationary bolt 32 extends at all times beyond this inner transverse partition 31 and into the space betweensaid partition and the said righthand side of the frame, as is clearly shown in Fig. 3. 28 of the bolt levers 2 serve to hold the bolts in their thrown position, as when the bolts are thrown the pins 30 leave the recesses 27 and ride upon the surfaces 28. The bolts 22 and 32 are adapted .to limit the movement of the electrically operated segment or actuator D to be'hereina fter described, which segment controls the movement of a drive wheel B, which drive wheel is adapted to act upon any one of a series of index wheels C, also to be hereinafter particularly mentioned.

A bar 33 extends from one side of the frame to the other at the'rear, and this bar 33 constitutes the yoke of a main set of magnets 34: and an auxiliary set of magnets 35, shown in Figs. 1,-8 and 9. A shaft 36 is mounted to rock in the upper rear portionof theframe of themacune, and this- The curved surfaces drum 49, mounted shaft carries a downwardly extending crank arm 37 at or near its left-hand end, a, similar arm 37 at or near its right-hand end, and an intermediate crank arm 37. A pivot pin 38 is passed through the lower end of the left-hand crank arm 37, as shown in Fig. 8, and this pivot pin 38 is likewise passed through a crank arm 38 from the armature 40 of the main magnet, the other end of the said armature being pivoted to the intermediate crank arm 37 on said shaft 36 as is shown inFig. 1. The crank arm 38 of the armature is rigidly secured to the shank 39 of a segment D by a. pin 41. or a like device. Thus when the magnets 34 are energized and the armature 40 attracted,

the free end of the shank 39 of the segment D will be raised as far as the projected bolt 22 operated by a key lever bolts are intended to regulate the upward throw of the segment. See Fig. 8. The segment is provided with a vertical head 42, toothed upon its forward or outer edge, and the teeth of the segment are adapted to engage with the teeth of a pinion 43 on a shaft 44 and located in the space between the left-hand side of the'frame and the parallel partition 31, as shown in Figs. 1 and 8. A drive wheel B is mounted to slide on the shaft- 44 and to turn with said shaft, see Fig. 1, but while the drive wheel moves upon its shaft relatively to the movement of the carriage of the type writer to which the attachment is made, it is not brought into action relative to an index wheel until one of the key levers has been pressed and the magnets 34 energized in a manner which will be hereinafter set forth.

The drive wheel B is acted upon by a car riage B, and this carriage is mounted to slide on a shaft 47, 10 and 11 and the said carriage is provided with a fork 46 which enters a circumferential groove 45, in the hub of-the drive wheel B, asindicated in Figs. 5 and 10. The carriage B is actuated by the movement of the carriage of the type writer to which the machine is applied, preferably in the following manner: A cord 48 made of metal or other material is secured to the left-hand end ortion of the carriage B, and is conducted .to the left-hand side of the attachment, and

ispassed around and secured to a spring to turn in brackets 50 at the left-hand side of the attachment, as shown in Fig. 1, while a similar cord 51 is attached to the right-hand end of the carriage B and is connected at the other end with one step of a differential pulleyv 52 mounted to turn, in brackets 53 and a secondcord 51 connected with the other step of the pulley is carried to an engagement with the carriage of the type-writing machine and over any necessary guide pulleys.

Thusitwill be observed. that the carriage will admit, as theseshown in Figs. 1, 4, 5,,

of the attachment travels with the carriage of the type-writing machine. A spring 54 is projected from the left-hand side of the frame, or from anearby support, over the shank 39 of the segment D employed to actuate the drive wheel B. This spring 54 is used to assist the segment in returning to its normal position.

A bar 55, which we denominate a universal bar, is depressed each. time that a key lever is forced downward at its rear end. In fact the bar 55 extends. beneath and in the downward path of each of the key levers, as shown in Fig. 1. This universal. bar 55 is connected by arms 56 with a rock shaft 57, and said shaft may be denominated a universal rock shaft. The universal bar. through the medium of this rock shaft 5'1 and connections, controls or regulates the 1 movement of the/major portion of the operative mechanism of the attachment. This universal rock shaft 57 is provided at its righthand end with a crank arm 58, and this arm is usually connected by a spring 59 with the segment shaft 36, or shaft that brings the segment in position for engagement with the pinion 43 on the drive shaft 44. The spring 59 serves to return-the universal bar 55 to its upper or normal position after a key lever has been removed from the influence of a numeral key of a typewriter; The crank'arm 58 of the universal rock shaft 57 is provided at its lower end with a pin 60, as shown in Fig. 9. The mechanism controlled by this crank arm 58 is shown in Figs. 4, 5, 6 and 9, and is as follows: A link 61 is pivoted to the righthand crank arm 37*- on the segment rock shaft 36, shown in Fig. 9, and this link 61, as shown in Fig. 4, has a bell crank connec tion 62 with an alining shaft 63, which shaft controls the mechanism for alining the index wheels C. This alining is accomplished through the medium of a bar 64, whose lower edge is usually made V-shaped, and this bar is'adapted to enter longitudinally alining spaces between the teeth of the aforesaid index wheels C, as illustrated in Figs. 1 and 4. This alining bar 64 is located across the upper central portion .of the index wheels, and is connected with the alining rock shaft 63 by means of arms 65 or their equivalents, and a mechanism E adapted to serve as a check to prevent too great a throw of the index wheels, is conin Figs. 4, 5 and 6.

The-controlling device for the check mechanism E consists of a. bar 66, pivoted in the arms 65 parallel with the alining bar 64 and alining shaft 63, and the said bar is provided with alongitudinal apron 67, which normally "extends downwardly and rearwardly therefrom throughout practically the full length of the bar 66, as illus- .trated in Fig. 1, and this apron is held in the aforesaid rearward and downward inclination through the medium of a spring 68,

of the frame, causing the apron 67 to be de-' pressed at that time. The downward movement of the crank arm 69 is limited by contact with a lower pin 71, also attached to the frame, as shown in Figs. 1 and 2. I

When the universal bar 55 is depressed by any one of the key levers A, motion is communicated to the segment rock shaft 36 and consequently to the segment D, by imparting to the link 61 a forward throw, and this is accomplished by causing the pin 60 on the arm 58 of the universal rock shaft 57 to 0perate in a depression 61 in the upper edge of an angle lever 61*, which angle lever is fulorumed by a, suitable pivot pin 61 to the inner face of the right-hand side of the frame of the attachment, as shown in Fig. 9; and the forward end of this lever 61 is connected by a short link 61 to the main link 61; and the downward movement of the main link 6-1 is limited by being brought in engagement with an eccentric stop 61, pivoted to the side of the frame below the said link 61,'as shown in Figs. 8 and 9. When a numeral key, for example the key indicating the numeral 1 on the typewriter, is depressed, the first half .of the .movement of the key lever A depressed by said key, causes a bolt 22 to be thrown outward and limit the upward movement of the electrically controlled segment D, raising the alining bar 64 and bringing the head 42 of the segment in mesh with the pinion 43, so that when the segment is raised by the movement of the armature 40 toward the magnet 34, the segment will immediately revolve the pinion 43 andconsequently the drive shaft 44 and the drive wheel B. The initial movement of the segment is accomplished by the movement of the segment shaft 36, as has been stated, and which is rocked by the depression of the universal bar 55 and consequent movement of the universal rock shaft 57, its arm 58 and the connection between said arm andthe link 61, as is shown in Fig. 9, which lat ter movement likewise serves to impart motion to the alinmg bar, as shown in Fig. 4.

The last half of the movement of the key leVeII; provides time for the armature 40 to wor and the same is true of the magnets 35'.

Two binding posts 72 and 73 are located at the left-hand side of the frame, being wired in suitable manner to a battery or other medium for generating electricity. The wiring as shown (see Fig. 13) consists of a wire 74, carried from the binding post 72 and woundaround theuniversal shaft 57. This wlre 74 is the mam wire, and is carried.

to a connection with a contact 75, which contact is in the nature of a spring and has a return section at one side having a point 7 6 formed thereon, and the contact 75 1s secured upon an insulating block 77, in turn secured to an arm 56 of the universal bar 55, as illustrated in Figs. 1 and 13. The contact 75 is therefore a movable contact, and is adapted to be brought in engagement with another contact 7 8, which is in the form of a spring, as is shown especially in Fig. 13, and this spring is attached to an insulating block79, secured to the bottom portion of the bar 11 which receives in the groove 12 the'bar 13 upon which. the key levers A are fulcrumed. A second contact point is likewise attached to the insulating block 79, and asthe universal shaft and its bar 55 are depressed by a figure key A of the typewriting machine, the contact 80- engages with the point 76 of the movable contact 75,

"once at the downward stroke of a key lever and again at the upward stroke of the key lever.

When such a contact is made, the auxiliary magnets 35 are energized and an auxiliary alming bar 1s brought into action,

as will be hereinafter described. The connections which occur between thecontacts 75 and 78, serve to energize the main magnets 34, and thus actuate the segment D and the shaft 44 on which the drive wheel B is mounted to turn and slide.

A wire 81 is carried from the contact 7 8 to the magnets 34 and through the magnets, from which the current is conducted to the binding post 73 through another wire 82,

shown in Fig. 1.; A wire 83, leading from' the contact 80, is carried to the auxiliary magnets 35, and the current passes through these magnets and along a wire 84, which is connected with the wire 82, and consequently to the binding post 73. But we desire it to be understood that the wiring may be differently accomplished, and that if desired instead of the drive wheel beingelectrically operated, it may be manually con. trolled,

An auxiliary alining bar 85 is locatedat the front of the machine, andis adapted to correct the alinement of the index wheels G in the event they should become disarranged vided at its forward end with while the shorter mem ever is in the na s downward and rearward,

iiat or "straight.

l C is mounted upon the ll crank lever 101, and a ated immediatel alining' bar 64 descends. lining bar 85 is given a e, greater on one side so that in the event the spaces f the index wheels are. e. said engaging point spaces and true ar is secured 0 rock inthe hment at the front, the aft 86 through f arms 87, as shown in Figs. 1, 8 normally holds the g bar out of eng also shown in before the main This auxiliary a taper at its on than the other, between the teeth 0 not in alinement, th

ily enter the said them. This auxiliary upon a shaft 86, frame of the attac secured to the sh each bell crank l finger, and extend its rear end being A carrying whee stud 102 of each be wheel C is 100 h of the index wheels heel is provided witl in the same ver and the outer endsof these d so that they may be al engagement with the f the flanges 94: secured nd in the normal powheels such a contact heels are prevented er except at that ain enter the wheels, thus permitted from the index ng wheels with he distance of mounted t carrying w at its periphery with the wheels, teeth are concave brought in friction outer peripheries o to the index wheels; a sition of the carrying The index w from turning to carry 0v time, when said teeth recesses 96 in the index ting the teeth 95 wheels to turn the carryi which said teeth 95 engage, 1: one tooth, and th the next index w greater than 9.

tween two adjoini about by producing side of each carrying w central porti punching ou punched portions, 105 act as t aces between index wheel. The 104: and the flange 94: of a very slight and The index whee turning by en cog teeth 105 o latter wheels are prevente of the curved teeth f the next index w The straigh junction with wheel of lower 0 have the ends made conc direction so as face of sufiicient len wheel, to be hel It will thus ofthe concave tee n them being ltof displacing th de the bent carrrying-wheel is tooth, or rather at each complete revoof lower order (1 at the time g. from 9 to 0, by the flange 9 entical' plane the medium 0' A spring 8 said auxiliary alinin with the ind Figs. land '2, an is not brought into ac points and 8 the auxiliary magnets 35. a

s moved by provi heels, as is d this auxiliary alini tion until the, contact thus energize The auxiliary ding a crank f the shaft of a connecting bar which connecting and is pivoted to d downward from i-liary magnets 85, 9, the said armature table-brackets 93 profroin the yoke 33'.

F of-the machine conwheels C, made and in any deheel is provided and upon each tooth a nud, the numerals reading inclusive, and the teeth of o enter the he teeth on the ind 1 moves independently, and ided upon one of its ar flange 94, and a d from this H a tooth connects hown in Fig. l,

ded with a recess heral portion at each llustrated also in dex wheels are mounted 7 the ends whereof f the attachment, ded at its right- Each index leeve 98, the sleeves on the shaft 97, and the index wheels are properly ashers 99 which are likewise ted on the shaft 97. A stationbelow and slightly shaft 44, as is also and a series of bell mounted on the these bell crank 0 engage and alining bar 1 arm 89 at the right-han 86, and pivoting one end 90 to the said crank arm, bar 90 is carried rearwar a crank arm 91, thearmature 92 o as illustrated in Fig being pivoted ected downward The adding head sists of a series of adding from any suit sired number. with'ten teeth, ineral is produce from, C 0 (C 9 3, the drive wheel spaces between t Eachindex whee each index wheel is prov side faces with an tooth 95 is projecte ing its sides recessed where with the flange, as s flange 94 is lik 96 at its outer perip side of "the tooth 95, Figs. 4 to 6. The in to turn freely on a shaft 9 may turn in the frame 0 and the said shaft is provi hand end with a kn wheel turns upon a s being loosely furthermore, spaced by' u us communicate motion to heel to indicate a sum This communication beng index-wheels is brought lateral teeth 105 at one heel at or about the riding teeth 104 by t the metal and bending the or otherwise, which teeth th of a cog and enter the the teeth of the adjoining contact between the teeth 11 index wheel is at times they do not is are in fact prevented from t with the lateral or f the carrying wheels,

d fromv turning gaging the heel to the right.

on of said bi able material Each index w t teeth 104 act in pairs in conthe flange 94 of the indexrder and each pair of teeth ave alike but in an to constitute a surgth to cause such card from rotation when be seen that each pair th are virtually one tooth, in the present ewise provi the space betwee instance the resu laterally in order to provi rying tooth turned the distance of one of teeth 104:, f the index wheel whose flange it engages when such wheel 15 passi virtue of the tooth 95 on g with the space betweenv a pair of 104 onthe carrying-wheel.

levers is longer t ends upwardly and be longer member ext a h t e es of index Wheels e raig t teeth her 103 of we I . turned on its axis,

'known as the Geneva movement, it

that its lateral tooth 105 is This construction is substantially what is being a modification of the well-lmown Geneva stop for watches. When the parts are in normal positions with the tens carrying-wheels C- all up, an index-Wheel C of lower order has the concave ends of a pair of straight teeth 104 of a carrying-wheel lying sufiiciently close to the flange 94 of the index wheel to lock the carrying-Wheel and at this time the lateral carrying-teeth 105 lie in the path of the -teeth on the periphery of the index-wheel of next higher order. Considering the relation between the straight teeth 104 and the flange 94 of a low order indexwheel, the relative shape of the parts is such that while the index-wheel. may be the carrying-wheel can not be turned, as will be readily understood more particularly from Figs. 4, 5, 15 and 16. This carrying-wheel is thus locked by its straight'teeth lying close to the flange 94 of the index-wheel of lower order, and the index-wheel of higher order is locked by reason of'a lateral tooth 105 of such carrying-wheel taking in between the teeth of said index-wheel of higher order. In or.-

der therefore to actu'at/e a certain indexwheel by the drive-wheel B, the tens-carry ing-wheel must be dropped or lowered so out of engage ment and outcof the path of the peripheral teeth of the said. index-wheel which may then be freely turned, as its flange 94 is then only in sliding engagement withapair of straight teeth 104 on the adjacent carryingwheel which does not prevent the turning of such index-wheel. This dropping of the carrying-wheel which by a lateral tooth 105, looks a certain index-wheel which it is de sired to operate is more clearly illustrated in Fig. 16, in which it may be supposed that the right hand index-wheel C is to be actuated by the drive-wheel B, when moved into engagement with it for the purpose. This index-wheel is free to turn because its pcripheral teeth are free from a carrying-tooth 105 of the dropped carrying-wheel C. Assuming now that the operation of the right hand index-wheel C in Fig. 16 is such as necessitates carrying over the tens to the index-wheel of next higher order at its lefthand side. This operation is effected b the single tooth 95 projecting from the ange 94 of the index-wheel of lower order which is being actuated, entering between twopairs of the straight teeth '104 of the carrying wheel C which is next to the dropped one, and giving such next carrying-wheel a turn and this serves to turn the index-wheel of next higher order one-tooth, through means of-the carrying-toothlOS of such carryingwh'eel engaging the peripheral teeth of the index-wheel to which the carrying is done.

The check mechanism E is illustrated in- .that a carrying wheel shall roeaevo detail in Figs. 4, 5, 6, 10 and 1, and consists of. a crank or L-shaped arm 106, the vertical member 106 whereof is pivoted in a yoke 107 attached to the carriage, and the upper member 106 faces the index or adding.

likewise assists'in returning the arm to its.

normal position when operated upon by the apron 67 of the depressing device carried by the upper alining bar frame. The Vertical member of the said arm 106 is provided with a stop 109, and the downwardly extending section 113 vided with a stop 110 and these two stops 109 and 110 serve tolimit the movement of the arm 106. A check finger 111 is pivoted on the arm 106 where its two members connect, and said finger 1.11 extends beyond the forward edge of the arm 106 and is normally held in an upward position, shown in Figs. 4 to 6 and Fig. 10, bya spring 112, but the upward movement of the said check finger is limited by a stop pin 114, located upon the upper extension 113 of the arm of the upper member is pro-' 106, while the downward movement of said finger 111 is limited by engagement with the stop 110.

The carrying wheels C are held in their upper position, or in engagement with the index wheels C, or are dropped out of engagement with said index wheels by means of thecams 115, one of said cams being provided for each bell crank lever 101 supporting a carrying wheel C. It is necessary be dropped before the index wheel C with which it mates can be operated, and at this alining bar 64 is raised and the apron 67 carried by said frame is depressed in a forwardly direction, as has been'described, the said apron will come in contact with the projecting portion 113 of the arm 106 of the check mechanism, as shown in Fig. 4, and will carry said arm forward and bring the finger 111 in the space between two teeth of the index wheel of next higher order to which the tens is to be carried and which is adjacent to the index-wheel then engaged by the drive-wheel B; and as" the said index wheel is turned by the drive wheel B, through the medium of the ca'rryingwheel C actuated through the segment D, the finger 111 will be carried downward until it reaches the'stop 110, thus permitting the index wheel of higher order to move the distance of one tooth only, and when the arm 106 is moved rearward from the index point it may be stated that when the frame of the upper wheel owing to the upward movement of the key lever that brought the arm into action, the check mechanism will likewise move rearward, and the spring-controlled finger 111 will disengage from the index Wheel. and return to its normal position, ready to be again brought into action with reference to any other of the index wheels. In this way the check finger 111 prevents the wheel of next higher order from over-rotating, that is from being turned more than one tooth when the tens value is carried thereto by the carrying-wheel.

The cams 115 are provided with cam slots 116 in their upper edges, adapted to receive the fingers or shorter members 103 of the bell crank levers 101, and eachcam 115 is also provided with a straight edge 11? above the recess 116 produced therein. The cams are loosely mounted upon a shaft 118, and this shaft is carried by a pivoted frame G to be hereinafter described. When the cams 115 are in their normal positions they incline downwardly and forwardly as shown in Fig. 1, and. the shorter members 1030f the bell crank levers engage with the straight edges 117' of the said cams, thus holding the carrying wheels C in their upper or normal. position; but Whena cam is rocked in an upward directiorn'the shorter member 103 of the bell crank lever which the cam con-- trols, enters .the slot 116 of the cam, and consequently the carrying wheel 0' mounted on that particular bell crank lever may dro; downward out of engagement with its mating index or adding wheel. The downward movement of the cams 115 is limited by projections 119 from their upper rear edges above the shaft 118, and when the cams are in. their normal position these projections engage with the rear side of a setting rock shaft 120. whose functions will be hereinafter set forth. The cams are actuated by a nut 123 mounted to revolve between project-ions 124 atone end of the carriage B, as shown in Figs. 4 and 5 and in Figs. 6 and 11, and this nut is mounted to slide on the carriage shaft 47 and to turn with said shaft, while the carriage simply slides on the shaft. Thenut 123 is provided with a peripheral recess 122, which is adapted to receive a. pin 121 projected rearwardly from the pivot portion of the cam to be acted upon. The carriage shaft 17 is mounted, to rock in the above-mentioned frame G, and the carriage shaft 47 is act-uated when the universal bar is depressed through the medium of a connecting rod 127, which is pivoted to an upwardly extending crank arm 126, located at one end of the carriage shaft 47, and the other end of the connecting bar 127 is pivoted to the lever 61 actuated by the'pendent arm 58 0f the universal shaft57, as shown in Fig. 9. Thus 95 it will be observed that each time the key lever is depressed the shaft 47 will be rocked in a manner to cause the cam 115 with which the nut 123 engages to be carried forward, permitting the carrying wheel located on the said cam to drop. The carriage B is provided with inclined surfaces 124; each end, in order that as the carriage slides upon its shaft 47 the said inclined surfaces 12st will carry the projections 119 of the cams 115 in engagement with the setting rock shaft 120 should any of the cams llo be outof normal position.

The swinging frame G consists of two side arms or plates 128 which are pivoted on pins 129 to the respective sides 10 of the frame. In the lower horizontally extending part 130 of each side piece 128 ismounted the respective ends of the cam-shaft 118, which is fixed, and also the respective ends of the carriage-shaft 47, which rocks inits hearings. Thus the swinging frame G comprises the two side-plates 128, the cam-shaft 118 and the carriage shaft 47 and these two shafts are always maintained in the same fixed relation to each other, at the same time the two shafts are bodily moved laterally by the swinging of'the frame, which is normally under spring tension by the action of the spring 136 bearingupon'one of the said plates and this spring serves to force the frame rearwardly whenever the frame is free from the' restraint of the cam-rollers 132 which are carried by the crank arms 133 fixed upon the setting rock shaft 120 and which cam-rollers ride over the rear edge of the respective side plates 128 of the frame G. The rear edge of each plate-128 is formed with a cam-recess 131 from which arises and runs forwardly and upwardly an inclined surface. Normally the cam-rollers 132 stand in recesses 131 and hold the frame .G at its forward limit of movement and against the action of its spring 136. When the setting rock-shaft 120 is rocked'so as to carry its crank arms 133 upwardly, the cam-rollers 132 thereof leaving the recesses 131 of the frame Gr move upwardly, over the forwardly inclined part thereof thus freeing the frame so that its spring can force it backwardly and thereby carry backwardly both the cam-shaft 118 and the carriageshaft 17. See more particularly Figs. 1, 5, 6, and 15. Thus while the bell -crank shaft 100 and the setting rock-shaft remain in fixed position relatively to each other, the camshaft 118 varies its distance from each by reason of the swinging of the frame G of which it forms part. In the normal positions of these parts, the frame G is swung forwardly and held in such position by reason of the cam-rollers 132 on the arnis 133 of the shaft 120 locking in the cam recesses 131 of the frame G, and under thls condition the upward projections 119 on the cams 115 are eachpressed against the rear side of the shaft 120, thereby raising each cam what may be termed its intermediate position, as shown in Fig. 4, and in which the straight part 117 of each camaengages the ,3 end of the finger 103 of each bell crank lever 101 in such a manner as to hold up thereby, the carriage shaft 47 1s rocked and crank lever 101 and permitting the same to.

each carrying-wheel into engagement with the index-wheels. When a carrying-wheel C is to be dropped in order to actuate the indexwheel C which is normally locked this causes the notch 122 in the nut 123, to bear downwardly against the pin 121 on the rear of the cam 115 so as toraise the forward end of the cam to its highest position, thereby raising the straight edge 11'? above the finger 103 of the engaging belldrop into the notch 116, which movement lowers the forward end of the lever and drops the carrying-wheel thereof out of reach of the index-wheels, as will be par- 101 to cause the outer ends'of the latter to drop and thus lower all of the carrying.- wheels, as shown in Fig. 6. From this position the parts are restored to their normal relations by the reverse movement of the set ting rock-shaft 120, carryingdownwardly and rearwardly its cranloarms 1.33 which move the cam-rollers 132 down the rear edge of the side plates 128 of frame G and press the same forwardly until the camrollers 132 enter the recesses 131 in said side plates, which movement restores the various parts to the positions shown in Fig.4 and in this connection it will be noted that while in both Figs. 4 and 6 the straight part 117 is in engagement with the finger 103 ofthe bell-crank lever 101, nevertheless such part 117 is lower than and stands farther rearwardly, in Fig. 6 than in Fig. 4, because the cam shaft 118 has been swung downwardly and backwardly by the frame G and hence is a greater distance from the bell-crank lever shaft 100, in Fig. 6 than it is in Fig. 4.

A guide bar is located below .the carrying wheels C, and this guide bar is provided with recesses 134, into which the teeth of the carrying wheels C enter, and are supported when said carrying wheels are in their lowered position, as illustrated in Fig. 5.

When it is desired to set one or more of the index wheels G, a this is accomplished without manipulating the universal bar 55, since a lever 137 is secured to the left-hand end of the setting rock shaft 120, asshown in Fig. 7, and this lever is pressed upward by a spring 138 and bears normally against .a stud 139, whichis secured to a second lever 140, the latter lever being pivoted to the left-hand end of the frame.

is provided with an outwardly and forwardly projected cam arm 141 and witha locking recess 142 at the inner end of the .arm. The upper lever is held in an upper or normal position by a spring 143 having a bearing against its lower end, and when the said lever 140 is in its normal position it rests at its upper end against a stop 144. By pressing down the lever 137 the rollers 132 on the crank arms 133 of the setting rock shaft 1.20 are-carried out of the recesses 131 in the pivoted frame G, and the said frame is immediately pressed upward and rearwardby a suitable spring 136 attached to the frame at one end and having bearing against the bottom forward portion of the frame G at its lower 61121, as is shown in Figs. 4, 5 and 6. This movement of the setting rock shaft will cause the frame G to swing so far rearward as to release the bell crank levers and permit the can ying Wheels C to drop to'their lower position, as shown in Fig. 6, whereupon any one of the index wheels C may be turned by the finger or by a pencil.

This lever 140 WVhen it is desired to reset all of the index 3 wheels, namely, bring all ofthe zeros in line at the top, as shown in Fig. 1, this is accomplished in the following manner:

controlling shaftis located in front of and slightly below the series of index wheels C, and this shaft is provided with crank arms 151 at its ends, pivoted to. the sides of the frame, and the shaft 150 is further provided with rearwardly extending pins 152, capable of entering the spaces between the index wheels C and extending in direction of the flanges 94 of said wheels. The controlling shaft 150 extends at one end through a slot produced in the left-hand portion of the frame, as illustrated in Fig. 7, and the pins on the shaft 150 are normally held away from the index wheels by the projccting end of the said shaft being in engagement with the lower end of the cam arm 141 of the lever 140, as shown in Fig. 7. But when the .pins 152 are to be carried into the spaces-between the index wheels C, the lever 140 is pressed downward, thereby also pressing in the same direction the lever 137 connected with the setting rock shaft 120,

and the projecting end of the pin shaft 150 will ride up the cam surface of the cam arm 141, and will enter the locking recess 142 in the lever 140, bringing the pins 152 to the desired position, as illus rated in Fig- 6.

Thus it will be observed that at this time the I on the flanges 94; of the index wheels engage with the said pins, at which time the index wheels C will cease to turn, and when all of the teeth 95 have engaged with the pins 152 zero will appear on each index or adding wheel at the top and in front of the main alining bar, as shown in Fig.1, since the tooth carrying zero is almost diametrically opposite to the single tooth 95 of an index wheel.

' It is necessary when the index wheels are to be reset that the main alining bar 6 1 should be simultaneously raised from the wheels, and this is effected by locating a downwardly and forwardly extending crank arm 146, see Figs. 1 and2, on the alining bar shaft 63, which crank arm 146 is engaged a pin 145 on a crank arm 1&5 attached to the sett ng rock shaft 120, as shown in Figs. 7 and 8.

It is very necessary that the drive wheel shaft shall not revolve until acted upon by the segment D. To that end a stop 1 17 is connected with the crank arm 1 16, as shown in Fig. 8, and this-stop has move-ment to and from the pinion 4.3. When the crank arm 1&6 is in its lower position, the stop 147 locks the pinion 43, but when the crank arm 1 16 is raised, which happens when the main alining bar is elevated, the stop leaves the pinion'and the pinion is free to move. A detent 148 is likewise provided for thepinion 43, the detentbeing controlled by a spring 1&9, and said detent prevents the pinion 43 from turning in the wrong direction.

In the general operation of the machine, let it be supposed a key lever A has been depressed by a key A of a type-writin 'machine. The key bolt 22 actuated by the said key lever A is moved into the path of the electrically operated segment D, and at the same time the main alining bar ("a is elevated and the carrying wheel C belonging to the index or adding wheel C which is to be turned, is lowered, and simultaneously the segment I) is brought into mesh with the pinion on the drive wheel shaft i4, and the check mechanism E is turned toward the index wheel to be operated upon, a tooth on the drive wheel B and the check arm 111 of the said check mechanism E entering the spaces between the teeth of two adjacent index wheels C. All of these movements are accomplished during the first half of the movement of the key lever A. Duringthe remaining half of the movement of the key lever A, the circuit in which the main magnet 34 is located is closed by the union of the two contacts 75 and 78, whereupon the segment D is raised by the armature of the said magnets, and the drive shaft is revolved, turning the drive wheel and consequently the index wheel the distance of one or more teeth according to which numeral key is depressed. As soon as the key lever A is relieved from pressure all the parts return to their normal positions. It will be remembered that the auxiliary alining bar 85 is normally out of engagement with the index wheels C, but during the first-half of themovement of the key lever A, the circuit including the secondary or auxiliary magnets closed by reason of the contact engagm with the moving contact 75, and

the auxi iary aliningbar is carried against- ,the front surfaces of the index or adding wheels C, insuring their alinement. The circuit is thenbroken, and the auxiliary alining bar is returned by its spring to its normal position. This operation is repeated as the key lever A is returned to its normal position, thereby insuring the alinement of the index wheels C, which will permit the main alining bar 64 to also drop into alining posit-ion.

\Vedesire it to be understood that the levers termed key levers may also be termed impressionlevers, since they are operated to produce an impression.

Having thus described our invention, we claim as new, and desire to secure by Letters Patent,

1. The combination with manually op erated keys for printing the letters of an ing the numeral wheels of the adding de vice after they are set.

2. In an adding attachment for typewriting machines, the combination of an adding head, a single driving wheel therefor, mechanism for moving tb driving wheel transversely of the head, electrically controlled devices for turning 'the wheel when in engagement with the head, impression levers controlling said electrical devices, means for regulating the rotation of the driving Wheel and means for alining the parts of the adding head when they are once set.

3. In an adding attachment for type-writing or similar machines, an adding he-ad,,a universal rock shaft, an operating bar therefor, key levers attached to act upon the operating bar and adding head, an alining bar for the head, a driving Wheel for the head having a sliding support, and a' check device for the head carried by the said support, an actuating connection bet-weenthe alining bar, the check device and the rock shaft, means for limiting the rotation of the driving wheel under the control of the keylevers, an electrically controlled mechanism arranged to impart rotating motion to-the driving wheel, and a second and independent electrically controlled mechanism adapted to operate an auxiliary alining bar for the head, as described: T

4. An adding attachment for type-writin or similar machines, comprising a head constructed in divisions and mounted to rotate, a drive wheel having sliding and rotary. motion, a tension device controlling the sliding .movement of the wheel, an electrically controlled mechanism arranged to impart rotating motion to the wheel, checks controlling the throw of the drive wheel, and levers arranged to control the said mechanism and connect with thesaid checks.

5. In an adding attachment for typewriters or similar machines, an adding device, impression levers, an electrically conextensions therefrom, provided with means for opening and closing an electric circuit, key levers controlling the movement of the said shaft, an alining bar and check for the adding device, and means for limiting the movement of the actuating. mechanism for the adding device under the control of the key levers, as described.

7. In an adding attachment for typewriting or similar machines, an adding head having a plurality of alining bars arranged for engagement with said head at diiferent point-s in the circumference of the said head, the said alining bars having independent movement and independent controlling mechanism.

8. In an adding attachment for typewriting or. similar machines, an addinghead, a plurality of alining bars arranged for longitudinal locking engagement with the said head at different points in its circumference and having independent movement, independent mechanism controlling the movement of the said alining bars, and key or impression levers arranged to control the controlling mechanism of the alining bars, as set forth.

9. In an adding attachment for type- Writing or similar machines, an adding head, a main alining bar, and a parallel auxiliary alining bar for the said head, the said bars having independent movement, and independent mechanisms for controlling the two alining bars at different and predetermined periods, as set forth.

head consisting of a series of wheels havingnumeral-carrying teeth arranged at corresponding intervals, a main alining bar arranged toenter corresponding spaces between the upper teeth of the, wheels comprised in the head, an auxiliary alining bar arranged to enter corresponding spaces between the teeth of the wheels of the head at a point below the upper surface of the head, and mechanisms adapted to independently operate the alining bars at different periods of time,'so that when one is active the other will be inactive, as described.

12. The combination of a pair of adding wheels each provided with an annular part and a trip piece, a tens-carrying wheel provided with a series of peripheral teeth having concaved faces adapted in turn to en- 'wri'ting or similar machines, a series of key gage the said annular part of the adding wheel. of lower order, the said carrying wheel also being provided with laterally extending'trip teeth projecting from the bodyof said wheel and adapted to. engage the adding wheel of higher order and means for operating said adding wheels, substantially as and for the purpose set forth.

13. In an adding attachment for typewriting or similar machines, an adding head, an actuating device for the said head, comprising a shaft and a wheel mounted to slide and to turn upon the said shaft, a pinion connected with said shaft and a segment controlling the movement of said pinion, devices for regulating the movement of the segment, key levers controlling the movement of the said devices, and an electric mechanism for actuatingthe segment under the control of the key levers of the machine.

'14. Ingan adding attachment for typelevers, an. adding head and its operative mechanism under the'control of the key levers, an auxiliary power also under the control of. the key levers-and adapted to act llt upon the adding head, which aum'liary power is independent of the main or controlling mechanism of the head and is capabl e of being brought into action at the 0ption of the operator, and means, substantially as described, for controlling the movement of the. said key levers.

=15. In an adding attachment for typewriting andv similar machines, an adding head, an operating mechanism for said head, an actuating device for the said operating mechanism, ltey levers cont-rolling the said actuating device, and checks for the said operating mechanism, the said checks consisting of a series of bolts adapted to be projected in the path of a member of said operating mechanism, angle levers, supports for said levers, each lever being provided with a recess adapted to receive a pin from a bolt and a segmental surface adjacent to the recess, and a connection between the said angle levers and the key levers, for the purposedescribed. v

16. In. an adding attachment for typewriting and similar machines, the combin.a-'

tion, with an adding head, of a carriage mounted to slide with said head, an alining bar for the head, a pivoted apron carried by the alining bar, its movement being controlled by the movement of the alining bar, and a check mechanism for-said head and carried by said carriage, the said check mechanism consisting of an arm provided with a spring-controlled finger, which finger is arranged to enter the spaces between the teeth of the adding head, and mea s, substa-ntially as described, for controlling the I movement of said arm by means of said apron, as specified.

17. In an adding attachment for typewriting or similar machines, the combination, with an adding head, an alining bar for the said head, means for operating the said alining bar, and a. spring-controlled apron carried by the support. of the alining bar, the movement of the said apron being controlled by the movement of the alining bar, of a carriage mounted to slide parallel with the adding head, a drive wheel for the adding head mounted to slide and turn, a fork connect-ionbetween said carriage and the drive wheel, an arm pivoted upon the car" riage, having an extension adapted to be engaged by said apron, and a spring controlled finger pivotally mounted on said arm and adapted to enter the spacesbet-Ween the teeth of the adding head, as and for the purpose set forth.

18. In an adding attachment. for typewriting or similar machines, an adding headconsisting of a series of adding wheels, a shaft upon which the adding wheels are loosely mounted, each adding wheel being provided with a series of peripheral teeth, each tooth bearing a numeral or a character ing the carrying wheels to free or to bind the adding wheels, a zero-setting shaft movable to and from the adding wheels, .projections carried by said shaft and adapted to engage with the teeth of the flanges on the adding wheels, an alining device for the adding wheels,'jand means for operating said device from the key levers of the machine.

119. In an adding attachment for typewriting or similar machines, an adding head consisting of a series of adding wheels, a shaft upon which the adding wheels are loosely mounted, each adding wheel being provided with peripheral teeth, each tooth having a numeral or a character produced upon its peripheral face, carrying wheels mounted upon movable supports, a flange secured to one face of each adding wheel,

ea-ch flange being provided with a single tooth and. with a recess at each side. of the tooth, the carrying wheels being loosely mounted below the adding wheels,'each carrving wheel having peripheral teeth provided with concaved outer surfaces arranged to engage with the periphery of the flange of an adding wheel. and with laterally and outwardly projecting teeth arranged to enter the spaces between the peripheral teeth of an adjacent adding wheel, means, substantially as shown and described for ralsi-ng and loweringthe said carrying wheels, a main and an auxiliary alining bar for the adding wheels, and mechanism for independently operating said alining bars, said mechanism being controlled bythe'key levers of the machine.

20. In an adding attachment for typewriting or similar machines, an adding head consisting of a series of adding Wheels having peripheral teeth, and a series of carrying wheels for the adding wheels, the carrying wheels being independently mounted and capable of movement to and from the adding wheels at right angles to their axes, the arrangement being such that any one of the series of carrying wheels may be moved toand from its adding wheel independently of the other and a mechanism for accomplishing such movement.

21. In an adding attachment for typewriting or similar machines, the combination with an adding head consisting of a series of adding wheels having peripheral teeth each tooth bearing a numeral or a character upon its peripheral. surface, said adding wheels having also side flanges each of said flangesbeing provided with a single tooth having recesses in the side edges of its shank, of a series of carrying wheels for the adding wheels each carrying wheel being provided with peripheral .teth in the same plane with the wheels, said peripheral teeth having concaved surfaces adapted to writing or similar machines, a series of addand from itsadding wheel independent of the other.

22. In an adding attachment for typeing wheels and a series of carrying wheels 5 right angles to their axes, the arrangement for the adding wheels, the carrying wheels being independently mounted and capable of movement to and from the adding wheels at being such that any one of the series can be moved to and; from its adding wheel independent of the other, and mechanism for accomplishing such movement, substantially as described 23.'In an adding attachment for type vwriting or similar machines, a series of adding Wheels, a series of carrying wheels for ;the adding wheels, the carrying wheels being independently mounted and having movement to and from the adding wheels at right angles to their axes, and a mechanism, substantially as described, for moving any number of the carrying wheels, orany individual carryingwheel to'or from engage ment with mating adding wheels. v

' 24. An adding head, a driving wheel for the adding wheels of the head, a segment in operative connection with the driving wheel,

and stops arranged to project in the-path of the segment and limit its throw.

25.. An adding head, a driving wheel for the adding wheels of the head, a segment arranged for driving connection with the driving wheels, key levers, and stops carried into or out of engagement with the segment by the action of the key levers when pressed and released.

26. An adding head, a driving shaft operatively connected with the adding wheels thereof, a pinion upon said shaft, a toothed member adapted to engage with the pinion, 'key levers, and a connection between the key levers and the toothed member, whereby said toothed member is moved into and out. of enmoving the said toothed member. in a direev tion transverse, to the axis f the pinion togagement with the pinion, andsmeans for cause the latter to turn when in engagement therewith.

27. An adding head, a driving wheel for the head, a shaft upon which the driving wheel is mounted to turn, a pinion upon said shaft, a toothed member adapted to engage which the driving wheel is mounted to turn,-

a pinion mounted upon said shaft, a segment adapted to engage with the pinion, key levers, a connection bet-ween the key levers and segment, whereby the segment is moved toand from the pinion, an electric power brought into action by the key levers, which power is in operative connection with the segment to raise and release the same, and a series of stops having movement to and from the path of the segment, which stops are operated by the key levers.

29. An adding head, a driving wheel for the adding wheels of the head, a segment arranged for driving connect-ion with the driving wheel, a mechanism for mechanically imparting movement to the segment, an electrically controlled mechanism arranged to impart driving movement to the segment, and key levers operating both the mechanical and electric mechanisms.

30.'In an adding attachment for type-' writing and similar machines, a series of key levers, a series of stops having sliding movement, and converting levers pivotally connecting the stops wlth the key levers.

31. In an adding attachment for typewriting and similar machines, a series of key levers, a series of stops capable of sliding movement, and converting levers ofangular construction, having one member provided with an offset adapted to engage apin upon the stop, the other member of the converting a .lever having pivotal connection with a key lever, the upper edges of; the converting levers being convexed between their members, for the purpose specified.

32. In adding attachments for type-writing and similar machines, an adding head and a check adapted to prevent the overthrow of the adding wheels of said head,

said checlpconsisting of a carriage, an arm upon the carriage capable. 9f movement to and from the .head, and a pawl upon the'said I arm, providedjwith limiting stops and arranged to be moved in and-out of engagement with an adding wheel for each carry- 33. In an adding machine, an adding head, 

